Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 84 · 40 questions

Thinking tip (Enough facts, then decide): Not enough evidence: “One mango was sour, so all are sour.” Enough: “We checked all 40 mangoes; every one was ripe.” Before you answer, check every fact you need is given. 7 rows with 9 in each → 7 × 9 = 63. “A box has 9 in each row” with no number of rows → not enough info. Missing facts hide in words like “and a bag”, “older” (by how much?) and “a long film” (how long?).

1. 1.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) enough evidence (b) not enough evidence
2. 2.🐕 One dog barked at you. What is the fair conclusion? (a) dogs hate you (b) all dogs are mean (c) that one dog barked (d) never see dogs
3. 3.📊 Which gives the best evidence about the class’s favourite game? (a) asking your pet (b) asking one friend (c) asking the whole class (d) guessing
4. 4.True or false: “One mango in the box was sour, so all the mangoes are sour.” gives enough evidence. (a) False (b) True
5. 5.📝 What does “evidence” mean? (a) facts that support it (b) a rumour (c) a loud opinion (d) a guess
6. 6.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) not enough evidence (b) enough evidence
7. 7.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) not enough evidence (b) enough evidence
8. 8.🔬 Why do scientists repeat an experiment? (a) to change answers (b) for fun only (c) to waste time (d) to be sure of results
9. 9.True or false: “It rained on my birthday once, so it always rains on birthdays.” gives enough evidence. (a) True (b) False
10. 10.🧩 Ishaan is 12 years old. Arjun is older than Ishaan. How old is Arjun? (a) 13 (b) 14 (c) 17 (d) not enough info
11. 11.🧩 Tara bought 2 kites for ₹110 in all. Each kite cost the same. What did one kite cost? (a) ₹110 (b) ₹60 (c) ₹55 (d) not enough info
12. 12.🧩 The film starts at 5 PM and lasts 2 hours. When does it end? (a) not enough info (b) 7 PM (c) 5 PM (d) 8 PM
13. 13.🧩 A box of guavas has 9 in each row. How many guavas are in the box? (a) 18 (b) 90 (c) 9 (d) not enough info
14. 14.🧩 Ananya bought 3 notebooks for ₹90 in all. Each notebook cost the same. What did one notebook cost? (a) ₹30 (b) ₹35 (c) ₹90 (d) not enough info
15. 15.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) enough evidence (b) not enough evidence
16. 16.🧩 A box of laddoos has 4 in each row. How many laddoos are in the box? (a) 40 (b) 4 (c) not enough info (d) 8
17. 17.🧩 The film starts at 4 PM and lasts 1 hour. When does it end? (a) 4 PM (b) 5 PM (c) 6 PM (d) not enough info
18. 18.🧩 A box of eggs has 4 in each row. How many eggs are in the box? (a) 4 (b) 8 (c) not enough info (d) 40
19. 19.True or false: “We tried the new route for 10 days, and it was faster every day.” does not give enough evidence. (a) True (b) False
20. 20.True or false: “We checked all 40 mangoes in the box; every one was ripe.” gives enough evidence. (a) False (b) True
21. 21.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” does not give enough evidence. (a) False (b) True
22. 22.🧩 Before solving a word problem, first check… (a) what facts are given (b) the colour of ink (c) the page number (d) your handwriting
23. 23.🧩 Enough evidence or not? “We tried the new route for 10 days, and it was faster every day.” (a) enough evidence (b) not enough evidence
24. 24.🧩 The film starts at 2 PM and lasts 3 hours. When does it end? (a) 2 PM (b) not enough info (c) 5 PM (d) 6 PM
25. 25.🧩 Ishaan bought 3 markers for ₹30 in all. Each marker cost the same. What did one marker cost? (a) ₹10 (b) not enough info (c) ₹15 (d) ₹30
26. 26.🧩 Ananya bought 2 balls and a cap for ₹130 in all. Each ball cost the same. What did one ball cost? (a) ₹65 (b) not enough info (c) ₹130 (d) ₹128
27. 27.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) enough evidence (b) not enough evidence
28. 28.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) True (b) False
29. 29.True or false: “One student said the canteen food was cold, so it is always cold.” gives enough evidence. (a) True (b) False
30. 30.🧩 Diya bought 4 pens and a water bottle for ₹130 in all. Each pen cost the same. What did one pen cost? (a) ₹126 (b) not enough info (c) ₹130 (d) ₹32
31. 31.🧩 The film starts at 5 PM. It is a long film. When does it end? (a) 6 PM (b) 8 PM (c) 7 PM (d) not enough info
32. 32.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) enough evidence (b) not enough evidence
33. 33.🧩 Aarav is 12 years old. Rohan is 8 years older than Aarav. How old is Rohan? (a) 8 (b) 21 (c) 20 (d) not enough info
34. 34.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) not enough evidence (b) enough evidence
35. 35.🥭 You taste one mango from a box of 50, and it is sweet. Can you be sure all 50 are sweet? (a) no, check more (b) no mango is sweet (c) yes, mangoes match (d) yes, it is certain
36. 36.🧩 Diya is 8 years old. Aarav is 3 years older than Diya. How old is Aarav? (a) 3 (b) 12 (c) not enough info (d) 11
37. 37.🧩 The film starts at 2 PM and lasts 2 hours. When does it end? (a) 2 PM (b) not enough info (c) 5 PM (d) 4 PM
38. 38.True or false: “We tried the new route for 10 days, and it was faster every day.” gives enough evidence. (a) True (b) False
39. 39.🧩 Aarav bought 6 markers for ₹180 in all. Each marker cost the same. What did one marker cost? (a) ₹35 (b) ₹180 (c) not enough info (d) ₹30
40. 40.🧩 The film starts at 2 PM. It is a long film. When does it end? (a) 4 PM (b) not enough info (c) 5 PM (d) 3 PM

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